readme.md in io-endpoint-0.2.0 vs readme.md in io-endpoint-0.3.0

@@ -16,8 +16,16 @@
 2.  Create your feature branch (`git checkout -b my-new-feature`).
 3.  Commit your changes (`git commit -am 'Add some feature'`).
 4.  Push to the branch (`git push origin my-new-feature`).
 5.  Create new Pull Request.
 
+### Developer Certificate of Origin
+
+This project uses the [Developer Certificate of Origin](https://developercertificate.org/). All contributors to this project must agree to this document to have their contributions accepted.
+
+### Contributor Covenant
+
+This project is governed by the [Contributor Covenant](https://www.contributor-covenant.org/). All contributors and participants agree to abide by its terms.
+
 ## See Also
 
   - [async-io](https://github.com/socketry/async-io) — Asynchronous IO primitives.